int gss_userok(const gss_name_t name, const char * username);
const gss_name_t name
(gss_name_t, read) Name to be compared.
const char * username
Zero terminated string with username.
Compare the username against the output from gss_export_name()
invoked on name, after removing the leading OID. This answers the
question whether the particular mechanism would authenticate them
as the same principal
This function is a GNU GSS specific extension, and is not
part of the official GSS API.